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jAvA AgE

int age = 20age是变量名,是编译器用来表示某块内存区域地址的标志,int是32位的,那age就是编译器表示内存中某个地方的32个bit

public class People { private String name; private Integer age = 20; public People(String name, Integer age) { System.out.println("A 1"); this.name = name; this.age = age; } public People(String name) { System.out.println("A 2"...

class A{ private String age =null; public void setAge(String age){ this.age = age; } this表示当前对象(即类A中,哪个对象调用该函数就表示该对象) 比如: A a = new A(); a.setAge("张三"),此时this相当于a对像。

int是一个变量的类型,age是变量的名字。 你的一个属性是年龄,那你的变量名就是 年龄,然后你的年龄是数字类型的,所以类型就是int int 年龄;

class Student{private String name;private int age;private String degree;public Student(String name, int age, String degree) {super();this.name = name;this.age = age;this.degree = degree;}public Student() {super();}public String...

public class Person { private String name; private int age; public Person(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name;...

import java.util.*; class AgeException extends Exception { String message; AgeException(int n) { message="您输入的数字超出范围,请输入(18~80)之内的数字"; } public String getMessage() { return message; } } class A { public void ...

class Person{ private String name; private int age; public Person(String name){ this.name=name; } public Person(String name, int age){ this.name=name; this.age =age; } //get/set省略 public void show(){ System.out.println("name:...

第一题 class Student{//student类 //属性 public int id; public String name; public String age; //方法 void learn(){System.out.println(name+"正在学习");} void practice(){System.out.println(name+"正在实践");} } 第二题 Student s1 =...

class Person{ private String name; private int age; public void say(){ } public void setAge(int age) throws Exception{ if(age>=1 && age

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